import {
	base64_encode,
	base64_decode
} from './base64.js';
import md5 from './md5.js';
import App from '../../App'
var util = {};

util.base64Encode = function(str) {
	return base64_encode(str)
};

util.base64Decode = function(str) {
	return base64_decode(str)
};

util.md5 = function(str) {
	return md5(str)
};


/**
	构造微擎地址, 
	@params action 微擎系统中的controller, action, do，格式为 'wxapp/home/navs'
	@params querystring 格式为 {参数名1 : 值1, 参数名2 : 值2}
*/
util.url = function(action, querystring) {
	// console.log('这是util下',App)
	var app = App;
	// 师傅端
	// var formvar = 'technical';
	// 用户端
	var formvar = 'wxapp';
	
	//#ifdef H5
	 formvar = 'mp';
	//#endif
	
	var url = app.siteInfo.siteroot + '?i=' + app.siteInfo.uniacid + '&t=' + app.siteInfo.multiid + '&v=' + app
		.siteInfo.version + '&from=' + formvar + '&';

	//#ifdef H5
	let urlquery = getQuery(window.location.href);
	if (urlquery.length > 0) {
		var urli = '';
		for (let i = 0; i < urlquery.length; i++) {
			if (urlquery[i] && urlquery[i].name && urlquery[i].value) {
				if (urlquery[i].name == "i") {
					urli = urlquery[i].name + '=' + urlquery[i].value;
				}
			}
		}
		if (urli) {
			url = 'https://' + window.location.host + '/app/index.php?t=' + app.siteInfo.multiid + '&v=' + app
				.siteInfo
				.version + '&from=wxapp&' + urli + '&';
		}
		//console.log(url);
	}
	//#endif

	if (action) {
		action = action.split('/');
		if (action[0]) {
			url += 'c=' + action[0] + '&';
		}
		if (action[1]) {
			url += 'a=' + action[1] + '&';
		}
		if (action[2]) {
			url += 'do=' + action[2] + '&';
		}
	}
	if (querystring && typeof querystring === 'object') {
		for (let param in querystring) {
			if (param && querystring.hasOwnProperty(param) && querystring[param]) {
				url += param + '=' + querystring[param] + '&';
			}
		}
	}

	return url;
}

function getQuery(url) {
	var theRequest = [];
	if (url.indexOf("?") != -1) {
		var str = url.split('?')[1];
		var strs = str.split("&");
		for (var i = 0; i < strs.length; i++) {
			if (strs[i].split("=")[0] && unescape(strs[i].split("=")[1])) {
				theRequest[i] = {
					'name': strs[i].split("=")[0],
					'value': unescape(strs[i].split("=")[1])
				}
			}
		}
	}
	return theRequest;
}
/*
 * 获取链接某个参数
 * url 链接地址
 * name 参数名称
 */
function getUrlParam(url, name) {
	var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)"); //构造一个含有目标参数的正则表达式对象  
	var r = url.split('?')[1].match(reg); //匹配目标参数  
	if (r != null) return unescape(r[2]);
	return null; //返回参数值  
}
/**
 * 获取签名 将链接地址的所有参数按字母排序后拼接加上token进行md5
 * url 链接地址
 * date 参数{参数名1 : 值1, 参数名2 : 值2} *
 * token 签名token 非必须
 */
function getSign(url, data, token) {
	var _ = require('./underscore.js');
	var md5 = require('./md5.js');
	var querystring = '';
	var sign = getUrlParam(url, 'sign');
	if (sign || (data && data.sign)) {
		return false;
	} else {
		if (url) {
			querystring = getQuery(url);
		}
		if (data) {
			var theRequest = [];
			for (let param in data) {
				if (param && data[param]) {
					theRequest = theRequest.concat({
						'name': param,
						'value': data[param]
					})
				}
			}
			querystring = querystring.concat(theRequest);
		}
		//排序
		querystring = _.sortBy(querystring, 'name');
		//去重
		querystring = _.uniq(querystring, true, 'name');
		var urlData = '';
		for (let i = 0; i < querystring.length; i++) {
			if (querystring[i] && querystring[i].name && querystring[i].value) {
				urlData += querystring[i].name + '=' + querystring[i].value;
				if (i < (querystring.length - 1)) {
					urlData += '&';
				}
			}
		}
		token = token ? token : App.siteInfo.token;
		sign = md5(urlData + token);
		return sign;
	}
}
util.getSign = function(url, data, token) {
	return getSign(url, data, token);
};
/**
	二次封装微信wx.request函数、增加交互体全、配置缓存、以及配合微擎格式化返回数据
*/
util.request = function(option) {
	var _ = require('./underscore.js');
	var md5 = require('./md5.js');
	var app = App;
	var option = option ? option : {};
	option.cachetime = option.cachetime ? option.cachetime : 0;
	option.showLoading = typeof option.showLoading != 'undefined' ? option.showLoading : true;
	var sessionid = uni.getStorageSync('userInfo').sessionid;
	var url = option.url;
	if (url.indexOf('http://') == -1 && url.indexOf('https://') == -1) {
		url = util.url(url);
	}
	var state = getUrlParam(url, 'state');
	if (!state && !(option.data && option.data.state) && sessionid) {
		url = url + '&state=we7sid-' + sessionid
	}
	if (!option.data || !option.data.m) {
		if (App.module) {
			url = url + '&m=' + App.module;
		} else {
			var nowPage = getCurrentPages();
			if (nowPage.length) {
				nowPage = nowPage[getCurrentPages().length - 1];
				if (nowPage && nowPage.__route__) {
					url = url + '&m=' + nowPage.__route__.split('/')[0];
				}
			}
		}


	}

	var sign = getSign(url, option.data);
	if (sign) {
		url = url + "&sign=" + sign;
	}
	if (!url) {
		return false;
	}
	uni.showNavigationBarLoading();
	if (option.showLoading) {
		util.showLoading();
	}
	if (option.cachetime) {
		var cachekey = md5(url);
		var cachedata = uni.getStorageSync(cachekey);
		var timestamp = Date.parse(new Date());

		if (cachedata && cachedata.data) {
			if (cachedata.expire > timestamp) {
				if (option.complete && typeof option.complete == 'function') {
					option.complete(cachedata);
				}
				if (option.success && typeof option.success == 'function') {
					option.success(cachedata);
				}
				//console.log('cache:' + url);
				uni.hideLoading();
				uni.hideNavigationBarLoading();
				return true;
			} else {
				uni.removeStorageSync(cachekey)
			}
		}
	}
	uni.request({
		'url': url,
		'data': option.data ? option.data : {},
		'header': option.header ? option.header : {},
		'method': option.method ? option.method : 'GET',
		'header': {
			'content-type': 'application/x-www-form-urlencoded'
		},
		'success': function(response) {
			uni.hideNavigationBarLoading();
			uni.hideLoading();
			if (response.data.errno) {
				if (response.data.errno == '41009') {
					uni.setStorageSync('userInfo', '');
					util.getUserInfo(function() {
						util.request(option)
					});
					return;
				} else {
					if (option.fail && typeof option.fail == 'function') {
						option.fail(response);
					} else {
						if (!response.data.message) {
							response.data.message = response.data.msg;
						}
						if (response.data.message) {
							if (response.data.data != null && response.data.data.redirect) {
								var redirect = response.data.data.redirect;
							} else {
								var redirect = '';
							}
							app.util.message(response.data.message, redirect, 'error');
						}
					}
					return;
				}
			} else {
				if (option.success && typeof option.success == 'function') {
					option.success(response);
				}
				//写入缓存，减少HTTP请求，并且如果网络异常可以读取缓存数据
				if (option.cachetime) {
					var cachedata = {
						'data': response.data,
						'expire': timestamp + option.cachetime * 1000
					};
					uni.setStorageSync(cachekey, cachedata);
				}
			}
		},
		'fail': function(response) {
			uni.hideNavigationBarLoading();
			uni.hideLoading();

			//如果请求失败，尝试从缓存中读取数据
			var md5 = require('./md5.js');
			var cachekey = md5(url);
			var cachedata = uni.getStorageSync(cachekey);
			if (cachedata && cachedata.data) {
				if (option.success && typeof option.success == 'function') {
					option.success(cachedata);
				}
				console.log('failreadcache:' + url);
				return true;
			} else {
				if (option.fail && typeof option.fail == 'function') {
					option.fail(response);
				}
			}
		},
		'complete': function(response) {
			// uni.hideNavigationBarLoading();
			// uni.hideLoading();
			if (option.complete && typeof option.complete == 'function') {
				option.complete(response);
			}
		}
	});
}
util.getWe7User = function(cb, code) {
	var userInfo = uni.getStorageSync('userInfo') || {};
	util.request({
		url: 'auth/session/openid',
		data: {
			code: code ? code : ''
		},
		cachetime: 0,
		showLoading: false,
		success: function(session) {
			if (!session.data.errno) {
				userInfo.sessionid = session.data.data.sessionid
				userInfo.memberInfo = session.data.data.userinfo
				uni.setStorageSync('userInfo', userInfo)
			}
			typeof cb == "function" && cb(userInfo);
		}
	});
}
util.upadteUser = function(wxInfo, cb) {

	var userInfo = uni.getStorageSync('userInfo');
	if (!wxInfo) {
		return typeof cb == "function" && cb(userInfo);;
	}
	userInfo.wxInfo = wxInfo.userInfo
	// uni.setStorageSync('userInfo', userInfo);
	util.request({
		url: 'auth/session/userinfo',
		data: {
			signature: wxInfo.signature,
			rawData: wxInfo.rawData,
			iv: wxInfo.iv,
			encryptedData: wxInfo.encryptedData
		},
		method: 'POST',
		header: {
			'content-type': 'application/x-www-form-urlencoded'
		},
		cachetime: 0,
		success: function(res) {
			if (!res.data.errno) {
				userInfo.memberInfo = res.data.data;
				uni.setStorageSync('userInfo', userInfo);
			}
			typeof cb == "function" && cb(userInfo);
		}
	});
}
util.checkSession = function(option) {
	util.request({
		url: 'auth/session/check',
		method: 'POST',
		cachetime: 0,
		showLoading: false,
		success: function(res) {
			if (!res.data.errno) {
				typeof option.success == "function" && option.success();
			} else {
				typeof option.fail == "function" && option.fail();
			}
		},
		fail: function() {
			typeof option.fail == "function" && option.fail();
		}
	})
}
/*
 * 获取用户信息
 */
util.getUserInfo = function(cb, wxInfo) {
	// #ifdef MP-WEIXIN
	var login = function() {

		var userInfo = {
			'sessionid': '',
			'wxInfo': '',
			'memberInfo': '',
		};

		uni.login({
			success: function(res) {
				util.getWe7User(function(userInfo) {

					if (wxInfo) {
						util.upadteUser(wxInfo, function(userInfo) {
							typeof cb == "function" && cb(userInfo);
						})
					} else {
						if (uni.canIUse('getUserInfo')) {
							// 如果可用
							uni.getUserInfo({
								withCredentials: true,
								success: function(wxInfo) {
									//console.log(wxInfo);
									util.upadteUser(wxInfo, function(userInfo) {
										typeof cb == "function" && cb(
											userInfo);
									})
								},
								fail: function() {
									typeof cb == "function" && cb(userInfo);
								}
							})
						} else {
							typeof cb == "function" && cb(userInfo);
						}
					}
				}, res.code)
			},
			fail: function(res) {
				console.log(res);
			}
		});
	};

	var userInfo = uni.getStorageSync('userInfo') || {};
	if (userInfo.sessionid) {
		util.checkSession({
			success: function() {
				if (wxInfo) {
					util.upadteUser(wxInfo, function(userInfo) {
						typeof cb == "function" && cb(userInfo);
					})
				} else {
					typeof cb == "function" && cb(userInfo);
				}
			},
			fail: function() {
				userInfo.sessionid = '';
				console.log('relogin');
				uni.removeStorageSync('userInfo');
				login();
			}
		})
	} else {
		//调用登录接口
		login();
	}
	// #endif

	// #ifdef H5

	var mplogin = function() {

		var userInfo = {
			'sessionid': '',
			'wxInfo': '',
			'memberInfo': '',
		};
		util.getWe7User(function(userInfo) {
			var ua = navigator.userAgent.toLowerCase();
			var isWeixin = ua.indexOf('micromessenger') != -1;

			if (isWeixin) {
				window.location.href =
					'/addons/'+ App.module +'/samos/public/index.php?s=/index/wechatmp/wechat&xmtoken=' +
					userInfo.sessionid +
					'&i=' + App.siteInfo.uniacid + '&backurl=' + encodeURIComponent(location.href)
			}
			typeof cb == "function" && cb(userInfo);
		}, '')

	};

	var userInfo = uni.getStorageSync('userInfo') || {};
	if (userInfo.sessionid) {
		util.checkSession({
			success: function() {
				typeof cb == "function" && cb(userInfo);
			},
			fail: function() {
				userInfo.sessionid = '';
				console.log('relogin');
				uni.removeStorageSync('userInfo');
				mplogin();
			}
		})
	} else {
		//调用登录接口
		mplogin();
	}

	// #endif

}

util.getmpuserinfo = function() {
	util.getUserInfo(function(userInfo) {

		var ua = navigator.userAgent.toLowerCase();
		var isWeixin = ua.indexOf('micromessenger') != -1;

		if (isWeixin) {
			window.location.href =
				'/addons/' + App.module + '/samos/public/index.php?s=/index/wechatmp/wechatuserinfo&xmtoken=' +
				userInfo.sessionid +
				'&i=' + App.siteInfo.uniacid + '&backurl=' + encodeURIComponent(location.href)
		}
	})
};

util.navigateBack = function(obj) {
	let delta = obj.delta ? obj.delta : 1;
	if (obj.data) {
		let pages = getCurrentPages()
		let curPage = pages[pages.length - (delta + 1)];
		if (curPage.pageForResult) {
			curPage.pageForResult(obj.data);
		} else {
			curPage.setData(obj.data);
		}
	}
	uni.navigateBack({
		delta: delta, // 回退前 delta(默认为1) 页面
		success: function(res) {
			// success
			typeof obj.success == "function" && obj.success(res);
		},
		fail: function(err) {
			// fail
			typeof obj.fail == "function" && obj.fail(err);
		},
		complete: function() {
			// complete
			typeof obj.complete == "function" && obj.complete();
		}
	})
};

util.footer = function($this) {
	let app = App;
	let that = $this;
	let tabBar = app.tabBar;
	for (let i in tabBar['list']) {
		tabBar['list'][i]['pageUrl'] = tabBar['list'][i]['pagePath'].replace(/(\?|#)[^"]*/g, '')
	}
	that.tabBar = tabBar;
	that.tabBar.thisurl = that.__route__
};
/*
 * 提示信息
 * type 为 success, error 当为 success,  时，为toast方式，否则为模态框的方式
 * redirect 为提示后的跳转地址, 跳转的时候可以加上 协议名称  
 * navigate:/we7/pages/detail/detail 以 navigateTo 的方法跳转，
 * redirect:/we7/pages/detail/detail 以 redirectTo 的方式跳转，默认为 redirect
 */
util.message = function(title, redirect, type) {
	if (!title) {
		return true;
	}
	if (typeof title == 'object') {
		redirect = title.redirect;
		type = title.type;
		title = title.title;
	}
	if (redirect) {
		var redirectType = redirect.substring(0, 9),
			url = '',
			redirectFunction = '';
		if (redirectType == 'navigate:') {
			redirectFunction = 'navigateTo';
			url = redirect.substring(9);
		} else if (redirectType == 'redirect:') {
			redirectFunction = 'redirectTo';
			url = redirect.substring(9);
		} else {
			url = redirect;
			redirectFunction = 'redirectTo';
		}
	}
	//console.log(url)
	if (!type) {
		type = 'success';
	}

	if (type == 'success') {
		uni.showToast({
			title: title,
			icon: 'success',
			duration: 2000,
			mask: url ? true : false,
			complete: function() {
				if (url) {
					setTimeout(function() {
						wx[redirectFunction]({
							url: url,
						});
					}, 1800);
				}

			}
		});
	} else if (type == 'error') {
		uni.showModal({
			title: '系统信息',
			content: title,
			showCancel: false,
			complete: function() {
				if (url) {
					wx[redirectFunction]({
						url: url,
					});
				}
			}
		});
	}
}

//util.user = util.getUserInfo;

//封装微信等待提示，防止ajax过多时，show多次
util.showLoading = function() {
	var isShowLoading = uni.getStorageSync('isShowLoading');
	if (isShowLoading) {
		uni.hideLoading();
		uni.setStorageSync('isShowLoading', false);
	}

	// uni.showLoading({
	// 	title: '加载中',
	// 	complete: function() {
	// 		uni.setStorageSync('isShowLoading', true);
	// 	},
	// 	fail: function() {
	// 		uni.setStorageSync('isShowLoading', false);
	// 	}
	// });
}

util.showImage = function(event) {
	var url = event ? event.currentTarget.dataset.preview : '';
	if (!url) {
		return false;
	}
	uni.previewImage({
		urls: [url]
	});
}

/**
 * 转换内容中的emoji表情为 unicode 码点，在Php中使用utf8_bytes来转换输出
 */
util.parseContent = function(string) {
	if (!string) {
		return string;
	}

	var ranges = [
		'\ud83c[\udf00-\udfff]', // U+1F300 to U+1F3FF
		'\ud83d[\udc00-\ude4f]', // U+1F400 to U+1F64F
		'\ud83d[\ude80-\udeff]' // U+1F680 to U+1F6FF
	];
	var emoji = string.match(
		new RegExp(ranges.join('|'), 'g'));

	if (emoji) {
		for (var i in emoji) {
			string = string.replace(emoji[i], '[U+' + emoji[i].codePointAt(0).toString(16).toUpperCase() + ']');
		}
	}
	return string;
}

util.date = function() {
	/**
	 * 判断闰年
	 * @param date Date日期对象
	 * @return boolean true 或false
	 */
	this.isLeapYear = function(date) {
		return (0 == date.getYear() % 4 && ((date.getYear() % 100 != 0) || (date.getYear() % 400 == 0)));
	}

	/**
	 * 日期对象转换为指定格式的字符串
	 * @param f 日期格式,格式定义如下 yyyy-MM-dd HH:mm:ss
	 * @param date Date日期对象, 如果缺省，则为当前时间
	 *
	 * YYYY/yyyy/YY/yy 表示年份  
	 * MM/M 月份  
	 * W/w 星期  
	 * dd/DD/d/D 日期  
	 * hh/HH/h/H 时间  
	 * mm/m 分钟  
	 * ss/SS/s/S 秒  
	 * @return string 指定格式的时间字符串
	 */
	this.dateToStr = function(formatStr, date) {
		formatStr = arguments[0] || "yyyy-MM-dd HH:mm:ss";
		date = arguments[1] || new Date();
		var str = formatStr;
		var Week = ['日', '一', '二', '三', '四', '五', '六'];
		str = str.replace(/yyyy|YYYY/, date.getFullYear());
		str = str.replace(/yy|YY/, (date.getYear() % 100) > 9 ? (date.getYear() % 100).toString() : '0' + (date
			.getYear() % 100));
		str = str.replace(/MM/, date.getMonth() > 9 ? (date.getMonth() + 1) : '0' + (date.getMonth() + 1));
		str = str.replace(/M/g, date.getMonth());
		str = str.replace(/w|W/g, Week[date.getDay()]);

		str = str.replace(/dd|DD/, date.getDate() > 9 ? date.getDate().toString() : '0' + date.getDate());
		str = str.replace(/d|D/g, date.getDate());

		str = str.replace(/hh|HH/, date.getHours() > 9 ? date.getHours().toString() : '0' + date.getHours());
		str = str.replace(/h|H/g, date.getHours());
		str = str.replace(/mm/, date.getMinutes() > 9 ? date.getMinutes().toString() : '0' + date.getMinutes());
		str = str.replace(/m/g, date.getMinutes());

		str = str.replace(/ss|SS/, date.getSeconds() > 9 ? date.getSeconds().toString() : '0' + date
			.getSeconds());
		str = str.replace(/s|S/g, date.getSeconds());

		return str;
	}


	/**
	 * 日期计算  
	 * @param strInterval string  可选值 y 年 m月 d日 w星期 ww周 h时 n分 s秒  
	 * @param num int
	 * @param date Date 日期对象
	 * @return Date 返回日期对象
	 */
	this.dateAdd = function(strInterval, num, date) {
		date = arguments[2] || new Date();
		switch (strInterval) {
			case 's':
				return new Date(date.getTime() + (1000 * num));
			case 'n':
				return new Date(date.getTime() + (60000 * num));
			case 'h':
				return new Date(date.getTime() + (3600000 * num));
			case 'd':
				return new Date(date.getTime() + (86400000 * num));
			case 'w':
				return new Date(date.getTime() + ((86400000 * 7) * num));
			case 'm':
				return new Date(date.getFullYear(), (date.getMonth()) + num, date.getDate(), date.getHours(),
					date.getMinutes(), date.getSeconds());
			case 'y':
				return new Date((date.getFullYear() + num), date.getMonth(), date.getDate(), date.getHours(),
					date.getMinutes(), date.getSeconds());
		}
	}

	/**
	 * 比较日期差 dtEnd 格式为日期型或者有效日期格式字符串
	 * @param strInterval string  可选值 y 年 m月 d日 w星期 ww周 h时 n分 s秒  
	 * @param dtStart Date  可选值 y 年 m月 d日 w星期 ww周 h时 n分 s秒
	 * @param dtEnd Date  可选值 y 年 m月 d日 w星期 ww周 h时 n分 s秒 
	 */
	this.dateDiff = function(strInterval, dtStart, dtEnd) {
		switch (strInterval) {
			case 's':
				return parseInt((dtEnd - dtStart) / 1000);
			case 'n':
				return parseInt((dtEnd - dtStart) / 60000);
			case 'h':
				return parseInt((dtEnd - dtStart) / 3600000);
			case 'd':
				return parseInt((dtEnd - dtStart) / 86400000);
			case 'w':
				return parseInt((dtEnd - dtStart) / (86400000 * 7));
			case 'm':
				return (dtEnd.getMonth() + 1) + ((dtEnd.getFullYear() - dtStart.getFullYear()) * 12) - (dtStart
					.getMonth() + 1);
			case 'y':
				return dtEnd.getFullYear() - dtStart.getFullYear();
		}
	}

	/**
	 * 字符串转换为日期对象 // eval 不可用
	 * @param date Date 格式为yyyy-MM-dd HH:mm:ss，必须按年月日时分秒的顺序，中间分隔符不限制
	 */
	this.strToDate = function(dateStr) {
		var data = dateStr;
		var reCat = /(\d{1,4})/gm;
		var t = data.match(reCat);
		t[1] = t[1] - 1;
		eval('var d = new Date(' + t.join(',') + ');');
		return d;
	}

	/**
	 * 把指定格式的字符串转换为日期对象yyyy-MM-dd HH:mm:ss
	 * 
	 */
	this.strFormatToDate = function(formatStr, dateStr) {
		var year = 0;
		var start = -1;
		var len = dateStr.length;
		if ((start = formatStr.indexOf('yyyy')) > -1 && start < len) {
			year = dateStr.substr(start, 4);
		}
		var month = 0;
		if ((start = formatStr.indexOf('MM')) > -1 && start < len) {
			month = parseInt(dateStr.substr(start, 2)) - 1;
		}
		var day = 0;
		if ((start = formatStr.indexOf('dd')) > -1 && start < len) {
			day = parseInt(dateStr.substr(start, 2));
		}
		var hour = 0;
		if (((start = formatStr.indexOf('HH')) > -1 || (start = formatStr.indexOf('hh')) > 1) && start < len) {
			hour = parseInt(dateStr.substr(start, 2));
		}
		var minute = 0;
		if ((start = formatStr.indexOf('mm')) > -1 && start < len) {
			minute = dateStr.substr(start, 2);
		}
		var second = 0;
		if ((start = formatStr.indexOf('ss')) > -1 && start < len) {
			second = dateStr.substr(start, 2);
		}
		return new Date(year, month, day, hour, minute, second);
	}


	/**
	 * 日期对象转换为毫秒数
	 */
	this.dateToLong = function(date) {
		return date.getTime();
	}

	/**
	 * 毫秒转换为日期对象
	 * @param dateVal number 日期的毫秒数 
	 */
	this.longToDate = function(dateVal) {
		return new Date(dateVal);
	}

	/**
	 * 判断字符串是否为日期格式
	 * @param str string 字符串
	 * @param formatStr string 日期格式， 如下 yyyy-MM-dd
	 */
	this.isDate = function(str, formatStr) {
		if (formatStr == null) {
			formatStr = "yyyyMMdd";
		}
		var yIndex = formatStr.indexOf("yyyy");
		if (yIndex == -1) {
			return false;
		}
		var year = str.substring(yIndex, yIndex + 4);
		var mIndex = formatStr.indexOf("MM");
		if (mIndex == -1) {
			return false;
		}
		var month = str.substring(mIndex, mIndex + 2);
		var dIndex = formatStr.indexOf("dd");
		if (dIndex == -1) {
			return false;
		}
		var day = str.substring(dIndex, dIndex + 2);
		if (!isNumber(year) || year > "2100" || year < "1900") {
			return false;
		}
		if (!isNumber(month) || month > "12" || month < "01") {
			return false;
		}
		if (day > getMaxDay(year, month) || day < "01") {
			return false;
		}
		return true;
	}

	this.getMaxDay = function(year, month) {
		if (month == 4 || month == 6 || month == 9 || month == 11)
			return "30";
		if (month == 2)
			if (year % 4 == 0 && year % 100 != 0 || year % 400 == 0)
				return "29";
			else
				return "28";
		return "31";
	}
	/**
	 *	变量是否为数字
	 */
	this.isNumber = function(str) {
		var regExp = /^\d+$/g;
		return regExp.test(str);
	}

	/**
	 * 把日期分割成数组 [年、月、日、时、分、秒]
	 */
	this.toArray = function(myDate) {
		myDate = arguments[0] || new Date();
		var myArray = Array();
		myArray[0] = myDate.getFullYear();
		myArray[1] = myDate.getMonth();
		myArray[2] = myDate.getDate();
		myArray[3] = myDate.getHours();
		myArray[4] = myDate.getMinutes();
		myArray[5] = myDate.getSeconds();
		return myArray;
	}

	/**
	 * 取得日期数据信息  
	 * 参数 interval 表示数据类型  
	 * y 年 M月 d日 w星期 ww周 h时 n分 s秒  
	 */
	this.datePart = function(interval, myDate) {
		myDate = arguments[1] || new Date();
		var partStr = '';
		var Week = ['日', '一', '二', '三', '四', '五', '六'];
		switch (interval) {
			case 'y':
				partStr = myDate.getFullYear();
				break;
			case 'M':
				partStr = myDate.getMonth() + 1;
				break;
			case 'd':
				partStr = myDate.getDate();
				break;
			case 'w':
				partStr = Week[myDate.getDay()];
				break;
			case 'ww':
				partStr = myDate.WeekNumOfYear();
				break;
			case 'h':
				partStr = myDate.getHours();
				break;
			case 'm':
				partStr = myDate.getMinutes();
				break;
			case 's':
				partStr = myDate.getSeconds();
				break;
		}
		return partStr;
	}

	/**
	 * 取得当前日期所在月的最大天数  
	 */
	this.maxDayOfDate = function(date) {
		date = arguments[0] || new Date();
		date.setDate(1);
		date.setMonth(date.getMonth() + 1);
		var time = date.getTime() - 24 * 60 * 60 * 1000;
		var newDate = new Date(time);
		return newDate.getDate();
	}
};

module.exports = util;
